/**
 * #      440
 * 名称   字典序的第K小数字
 * 链接   https://leetcode-cn.com/problems/k-th-smallest-in-lexicographical-order
 * 题解   [100](https://leetcode-cn.com/problems/k-th-smallest-in-lexicographical-order/solution)
 * 通过率 36.9%
 * 难道   困难
 */

